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No. 752,621. PATENTED FEB. 16, 1904 M. HUERTH & 0. F. OLSON.

WIRE OR CABLE STRETGHER.

APPLICATION FILED MAR. 11, 1903.

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N0 MODEL.

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Oii}; Sf (Maw No.-752,621. PATENTED FEB. 16, 1904. M. HUERTH & 0. P. OLSON.

WIRE 0R CABLE STRETGHER.

APPLICATION FILED MAR. 11, 1903.

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UNITED STATES Patented February 16, 1904.

PATENT OFFICE.

MATHIAS HUERTH AND OTTO F. OLSON, OF OREGON CITY, OREGON.

WIRE OR CABLE STRETCHER.

SPECIFICATION forming part of Letters Patent No. 752,621, da ed February 16, 1904:.

Application filed March 11,1903- To oaZZ whom it may concern:

Be it known that we, MATHIAS HUERTH and OTTO F. OLsoN, citizens of the United States, and residents of Oregon City, Clackamas county, State of Oregon, have inventeda new and useful Improvement in Wire or Cable Stretchers, of which the following is a specification, reference being had to the accompanying drawings as a part thereof.

Our invention has for its object to obtain a powerful and simply-constructed device conveniently used for stretching or pulling taut the wires used in the construction of wire fences, also for stretching telegraph and telephone wires, wire cables, and like purposes.

We attain our. object in the device illustrated in the drawings .above referred to and embodying the certain novel and useful features hereinafter described and claimed.

In the drawings, Figure 1 is a perspective of our wire-stretcher, showing the same as secured to the stump of a tree and practically used. Fig. 2 is a side elevation of our device. Fig. 3 is a plan of the same. Fig. lis a partial plan section, on an enlarged scale, more particularly showing the Wire-gripping mechanism provided on the front part of our wirestretcher and of which the like mechanism provided on the rear end of our device is substantially a duplicate. Fig. 5 is a blank cut out of a sheet of metal forthe construction of one of the boxes inclosing the wire-gripping mechanism. Fig. 6 is a transverse section, on an enlarged scale, taken on a line w m of Fig. 3. Fig. 7 is a like section taken on a line y 3 Fig. 8 is a like section taken on a line a z, and Fig. 9 is a partial plan of the botto of our device.

The letters designate the parts referred to.

Our wire-stretcher is made of a base-plate (0, having side portions 6 b, which are turned up, as shown, to provide ways for the plate 9 Serial No. 147,305. (No model.)

mechanism-that is, the movable wire-gripping mechanism pivoted on the front end of the base-plate and which gripping mechanism is pushed forward and drawn back again by operating the lever 03.

On the rear end of the base-plate (1/ there is fixedly mounted a box it, in which is contained the secondary wire-gripping mechanism. The function of the latter is to rigidly hold the end of the wire While moving the primary wiregripping mechanism forward over the wire in the act of taking hold of the wire further forward to pull and stretch the same. The primary and secondary gripping mechanisms are substantially alike in their construction. The details thereof are shown in Figs. 4., 5, 6, and 7 with respect to the primary grippingmcchanism. Such mechanism consists (see Fig. 4) of a pair of oppositely-pivoted cams p 22, having serrations on their opposed faces, and they are constrained to their normal position by the springs r 7*. Thus a wire being inserted between the cams the cams do not resist the travel of the wire in the direction indicated by the arrow; but the moment the wire starts to draw back-that is, in the opposite direction-the cams will close upon it and firmly grip the same, and such grip becomes tighter in proportion to the force of the back pull on the wire. The sliding plate g, on which the primary gripping mechanism is secured, and the housing for the latter are conveniently made in one piece by cutting out of a sheet of metal a plate of the shape shown in Fig. 5. Slits are cut in such plate at g, and the same is then folded on the dotted lines and c" 71 5 so as to form the box c, (shown in perspective in Fig. 1,) the portions 71* being bolted to the plate 9. When the formation of the box has been completed, there will be a central longitudinal slot 2' through which to insert the wire w. The front end of the boxz' is closed by means of a slotted angle-plate if, rcsembling in its detail of construction the plate 1', forming a closure for the rear end of the box h. The plate k is secured in place by the bolts Z, which also constitute the pivoting-pins for the cams p p.

The secondary wire-gripping mechanism is fixedly mounted on the rear end of the baseplate a. It comprises a pair of grippingcams s 8, contained in the box h. The box it is substantially of the same construction as the box 4;. The cams s s are constructed and p0- sitioned like the cams p p, and they are constrained to their normal position by springs like 1" r.

The rear end of the box it is closed by a slotted angle-plate j, as mentioned, and the bolts m constitute the pivoting-pins of the cams s s and also serve to bolt the box it to the baseplate a. To the rear face of the plate j there is provided a latch bar 0, consisting of a curved member pivoted at one end and adapted to be turned down upon the wire w, as shown in Fig. 1,.so as to hold such wire-against being pulled out from between the cams s s by any inadvertent upward pull.

On the front end of the base-plate a is mounted a standard a, in which is journaled a pulley 02/, operating to hold the wire against being pulled upwardly from between the cams p 19. To the bottom of the front portion of the base-plate a there is welded a stiffeningplate t, and on the bottom of the rear portion of the base-plate a there is riveted a plate t, provided with a fork to and ear to. To the latter is fastened a chain 4), the free end of which may be secured on the fork u for the purpose of chaining our wire-stretcher to a tree-stump or other suitable support, as shown in Fig. 1. The size and strength of our wirestretcher will of course be made in accordance with the work for which it is to be used.

The operation of our device is as follows: The wire end w is inserted in the wire-gripping mechanism of our wire-stretcher, as illustrated in Fig. 1. The lever (Z is then operated so as to move forward the box 2', containing the primary gripping mechanism. In so doing the earns 19 p slide over the wire. The lever (Z is then reversed, simultaneously with which the cams p p close upon and grip the wire between them, and the wire may be pulled taut by continuing to bear upon the lever. While so pulling the wire the free end thereof passes through the cams s 8 without interfer- The moment, however, the forward pull of the wire is slackened and the wire begins to pull back the cams s 8 close upon and firmly grip the same. If the slack has not been sufliciently taken out of the wire, the described operation of the lever cl may be repeated as required. Upon the wire having been rendered sufficiently taut the free end is properly secured, and thereupon the wirestretcher is taken off the wire. The wire is inserted or released by lifting back the latch is thus apparent that one device may also be conveniently used for operating on a wire the two ends of which are fastened.

Having described our invention, we claim and desire to secure by Letters Patent 1. A wire stretcher, comprising a baseplate, provided with ways t, b, a plate 9, sliding in said ways, and having mounted thereon a pair of spring-controlled cams p, p; a box inclosing the same and provided with a longitudinal slot through which to insert the wire; a standard 0, a lever pivoted thereto; a connection between such lever and the plate g; a second pair of spring-controlled cams s, s, a box inclosing the same, and provided with a longitudinal slot in which to insert the wire; means for holding the wire against being pulled upwardly from between said cams, and means for securing the wire-stretcher to a fixed support, substantially as set forth.

2. A wire stretcher, comprising a baseplate provided with ways I), b, a plate 9, sliding in said ways, and having mounted thereon a pair of spring-controlled cams 10, p; a box 6, inclosing the same and provided with a longitudinal slot through which to insert the wire; a standard 0, a lever pivoted thereto; a connection between such lever and the plate g; a second pair of spring-controlled cams s, s, a box h, inclosing the same, and provided with a longitudinal slot in which to insert the wire; means for holding the wire against being pulled upwardly from between said cams; an ear u, a chain a), and a fork a, substantially as set forth.

3. A wire stretcher, comprising a baseplate provided with ways 6, b; a plate g, sliding in said ways and having mounted thereon a pair of spring-controlled cams p, p; a box '11, inclosing the same, and provided with a longitudinal slot through which to insert the wire; a standard n, and a pulley n, journaled therein adapted to hold the front end of the wire against being pulled upwardly from between said cams p, p; a standard 0, and a lever pivoted thereto; a connection between said lever and the plate g; a second pair of springcontrolled cams s, s; a box it, inclosing the same and provided with a longitudinal slot in which to insert the wire; means for holding the back end of the wire against being pulled upwardly from between said cams s, s; an car a, a chain c, and a fork u, substantially as set .forth.

In testimony whereof we have hereunto affixed our signatures in the presence of two wit- T. J. GEIsLER, MAE LOEB.

IIO 

